From 336cf3083232e824c8990834b56c6a1068b5a631 Mon Sep 17 00:00:00 2001
From: Michiel van den Heuvel <michielvdnheuvel@gmail.com>
Date: Sat, 24 Jun 2023 19:46:03 +0200
Subject: Make formatting options sort of configurable

This should be wired up to code that's in a pull request in the vis
repository for the default options. This PR does not yet expose
`expandtab`.

Referenced PR: https://github.com/martanne/vis/pull/717
---
 README.md             | 2 ++
 init.lua              | 7 ++++++-
 supported-servers.lua | 1 +
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index b9d6cae..ffd98d6 100644
--- a/README.md
+++ b/README.md
@@ -153,6 +153,7 @@ Additional fields are:
 
 * `settings` - a table of arbitrary possibly nested data. It is sent in a `workspace/didChangeConfiguration` to the language server after initialization. It is also used to lookup configuration for the `workspace/configuratio` method call.
 * `init_options` - table of arbitrary possibly nested data. It is send to the server as `initializationOptions` in the parameters of the `initialize` method call.
+* `formatting_options` - table of configuration data as found in [the LSP specification](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_formatting). `tabSize` and `insertSpaces` are required.
 
 **Example:** The language server configuration entry in the  `ls_map` for lua-language-server
 
@@ -163,6 +164,7 @@ ls_map.lua = {
   settings = {
     Lua = {diagnostics = {globals = {'vis'}}, telemetry = {enable = false}},
   },
+  formatting_options = {tabSize = 2, insertSpaces = true},
 },
 ```
 
diff --git a/init.lua b/init.lua
index 48f7b97..843bfdc 100644
--- a/init.lua
+++ b/init.lua
@@ -1109,6 +1109,7 @@ local function ls_start_server(syntax)
   local ls = {
     name = ls_conf.name,
     settings = ls_conf.settings,
+    formatting_options = ls_conf.formatting_options,
     initialized = false,
     id = 0,
     inflight = {},
@@ -1345,8 +1346,12 @@ vis:command_register('lspc-format', function(_, _, win)
 
   local params = {
     textDocument = {uri = path_to_uri(win.file.path)},
-    options = {tabSize = 2, insertSpaces = true},
+    options = ls.formatting_options,
   }
+  if params.options == nil then
+    -- probably a safe default, but this should be hooked up to the vis options
+    params.options = {tabSize = 4, insertSpaces = true}
+  end
 
   ls_call_text_document_method(ls, 'formatting', params, win)
 end)
diff --git a/supported-servers.lua b/supported-servers.lua
index 62583b9..eaaa855 100644
--- a/supported-servers.lua
+++ b/supported-servers.lua
@@ -40,6 +40,7 @@ return {
     settings = {
       Lua = {diagnostics = {globals = {'vis'}}, telemetry = {enable = false}},
     },
+    formatting_options = {tabSize = 2, insertSpaces = true},
   },
   -- typescript (typescript-language-server) language server configuration
   -- https://github.com/typescript-language-server/typescript-language-server
-- 
cgit v1.2.3